Cruise Air units do discharge warm air under the coach. However, some converters use "packages" for their AC needs such as those that might be used for a home or apartment. They also discharge warm air under the coach.

Typically a Cruise Air equipped coach has 2 or three condenser units located behind the front bumper, and possibly two located midships in the center of the coach.

These spaces are of course useable, but they are of limited value because they are not conveniently located for user access. Roof air units make all this space available and do not discharge hot air beneath the coach. The downside to roof air is reported by some owners as increased interior noise levels.